Spraying-pump.



F. S. WELCH. SPRAYING PUMP. APPLICTKON FILED JAN. 8,1916.

Patented sept. 25, 1917.

2 SHEETS-SHEET l.

F. S. WELCH. SPRAYING PUMP. APPLICATION FILED IAN. 191e.

| I l l www? UM flroR/YEY FRED S.r WELCH, 0F PONTIAC, MICHIGAN, ASSIGNOR TO PONTIAC TRACTOR COMPANY,

OF PONTIAC, MICHIGAN, A CORPORATION OF MICHIGAN.

sPnAYING-PMP.

Application filed January 8, 1916.

To all 'whom t may concern:

Be it known that I, FRED S. WELCH, a citizen of the United States, residing at Pontiac, county of Oakland, State of Michigan, have invented a certain new and useful Improvement in Spraying-Pumps, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part 0f this specification.

My invention relates to sprayingy pumps and an object of my improvements is to provide an improved construction which may be cheaply constructed and easily assembled and disassembled and in which the valves are conveniently accessible for cleaning.

I secure this object in the device illustrated in the accompanying drawings in which,

Figure 1 is an elevation partly in section of an apparatus embodying my invention.

Fig. 2 is a plan view' of the same, also partly in section.

Fig. 3 is an elevation looking from the right of Fig. 1, the pressure tank and valvemanifold being removed.

Fig. 4 is a plan view, partly broken away, of the valve manifold.

Fig. 5 is a detail section on the line E-E Fig. 4.

Fig. 6 is a section on the line F-F Fig. 4.

Fig. 7 is a section on the line G-Gr Fig. 4.

a a are the cylinders and a2 a2 the plungers operating in the cylinders of a pump a a. f2 is the crank shaft and f f the cranks joined to the plungers a2 a2 by connecting rods g g. 7L is a worm wheel inclosed ina casing h2 and keyed upon the shaft f2. z' is a. shaft which. is rotated by the source of power, for instance, an internal combustion engine. y' is a worm upon the shaft c, its

threads engaging the teeth of the worm wheel 7L. m is a suction manifold communieating with the intake valve of the pump as hereinafter described by the conduit m2 and with the spraying fluid by a pipe lc extending into a reservoir of such fluid, the cover of which is indicated by the reference character k2, which cover forms a support for the pump and connecting apparatus. I) is a pressure tank having a gage b2 at its upper end to indicate the pressure of the air vimprisoned therein, andl a delivery pipev b3 leading to the spraying nozzle.

Specification of Letters Patent.

` Patented Sept. 25, 1917.

serial No. 71,093.

c is a valve manifold. d is a piecel of angle iron bent into parallel portions joined by a loop and having one horizontal and one vertical flange. The pump cylinders a a are in an integral casting and are secured to, and extend between, the parallel portions of the strap iron cl. The loop of said iron bends around the pressure tank b and at this point, for convenience of construction, the horizontal flange is cut away as shown in Fig. 2. cl2 Z2 are set screws engaging the strap iron d and pressing against the pressure tank t.

The valve manifold c is placed with the walls surrounding its proper apertures engaging against the intake and dischargel orifices of the pump. The pressure tank isy then placed in the loop of the strap iron 0l with the walls surrounding the intake aperture, engaging against the wall surrounding the discharge aperture a leading from the manifold c. The set screws Z2 d2 are then set up firmly with a wrench thus engaging all the parts together and completing the assembly of the apparatus.

The walls n n of the intake orifices .to the cylinders a a and the walls m3 surrounding the delivery end of the suction'pipe m2, are arranged in approximately the same plane. The valve manifold c is provided with apertures o o and their surrounding walls are adapted to engage,` and form a tight joint with the intake orifices a a of the cylinders a a. p is an orifice through which the spraying fluid enters the manifold 0. The walls surrounding the orifice 7) are adapted to engage the walls surrounding the orifice m3. a indicates the passage through which the spraying fluid passes from the manifold c to the compression tank b.

The manifold c is an integral casting, the entrance orice 79 expands into a cored passage p2 in the lower part of the manifold 'and in the upper wall at each end of the forced back through the orifice'v 0, into-thel chamber o2 past a valve r into the passage r3 past a valve t through the opening Minto the pressure tank b.

s2y indicates plugs closing. orifices through` which access may be had to the valves s s and r2 r2 are plugs closing vorifices through which access may be had to they valves 1 r. zf isa plug closingthe orifice. by which access may be had to the valve t.

Thepassage 'v opens from. the chamber or'passage r3 and is provided witha relief valve o2 which discharges through 'a pipe o3 through an. opening 7c3 in the supply reservoiry cover back into the supply reservoir.

The reliefvalve u2 being. located between the valves r and t both of which valvesopen away' from `the cylinder and. toward vthe compression chamber there yis but little loss of liquidiwhen the relief acts to lower the pressure atthis place andthe action of the piston is notV interfered with. y

Spraying pumps are used with liquids that are somewhat corrosive and liable to form deposits, it is therefore necessary to makethevalves accessible for cleaning. and repairing Inthe above described apparatusthe looseningv of the set screws d2 Z2 per-1 mits the valve manifoldwith.. all the valves therein to be removed which may4 then be placedin areservoir of water to soak off.v

the deposit and' clean the valves and passages. Eachv of the valves is accessible through an' aperture closed by a screw plu-g. The angle. irond is of! structural material.

easily obtained upon the market and forms a strong,. cheap, and convenient basel for,

assembling theparts.v

WhatI claim is:-

l. In. an apparatus ofthe kind described, an angle. iron bent into parallel portions joined by a loop, oneange of the angle iron being horizontal, a4 pump secured to said parallel portion upon the horizontal flange, and a. pressure tank secured. in said loop.

2l In an apparatus of thekind described,

an angle iron bent into parallel portions joined by. a loop, a pump securedfto `said parallel portions, and a pressure tank securedfin said. loop, a manifold'located betweensaid pump and..y pressure tank,'and means engaging said loop for forcingsaid tank towardsaid pump for the purpose de? scribed.y

3l rlhe combination of a pump, havingk an aperture. with engagingwalls, a. pressure tank having an laperture with vengaging lassaofe a valve in saidwall o eninw. tothe second passage, a wall above said second passage 1n part divldingthe same from the outer'l air and in part dividing. thev same from. the third passage, a valve opening. fronrsaid second passage to the third pas`A sage, the wal-labove said secondzpassage being` provided with an. aperture adapted to permitthe removal .ofthe valve located' between. saidi'passage and the intake passage,

and'` a removable means for closing said aperture, a pump having a. cylinder and an.

aperture opening from. said cylinderI communicating, withv said' second passage, and a discharge orifice leadingffrom said third passage.

5. In an. apparatus of'v theY kind described,

an angle iron bent 1n parallel portions joined by a loop one flange'of't-he anglefiron being. horiontal and cutaway at the loop, portion, a pump secured to said parallel.

portions upon, the horizontal. flange, andi. a pressure tank secured'` 1n saldloop.

6. In an ,apparatus oflthev kind described,

an angle iron bent in parallel. portionsy joined byv a loop one frameofthe angle iron beinghorizontal. and cut. awayatathe loep. portion, a pump secured. .tosaid parallel -por.

tionsupon thefhorizontal flange, and a pressure tank secured in sa-id loop, amanifoldv located between saidr. pump. andpressure tank, and means engaging said loopY forr forcing-said tank toward said pump; forl the purpose described-.

7 In an apparatusof thek-inddescribed,

an iron. bent into parallel'portions joined .byY a loop, a pump secured tosaidi parallelvpor pump, and an aperture having a wall entions, anda pressure tank secured in said.

loop, a .-manifoldlocated between saidlpump and pressure. tank-,-and meansengaging said.. loop for forcing.. -sald tank. toward vsaid pump forfthe Apurpose described.

8.. In an apparatusoflthekind described,

a compressioncylinder, a. compression cham.-

ber., a conduiti connecting.. said cylinder and chamber, two.. automatic` valves. in said con.- duit. opening; toward said chamber and. closing.v away fr.om..said chamber., andf a. relief valve located. between said. twoU valves..

In .testimony`l` whereof 1I sign. this` specification.

FRED s. WELCH;

Copies ofthkisfpatentymay be. obtained' fon-five cents each;- by addressing.cheA GQmmiSSiouer q1. Patente-U I Washington, D. C. 

